• State TI Thinks Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 83 subscribers
  • Views 601 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS320F28P650DK: C2000 ACMC Examples

Mike Allette
Intellectual 300 points
Part Number: TMS320F28P650DK
Other Parts Discussed in Thread: PMP23338, TIDM-DC-DC-BUCK, BOOSTXL-BUCKCONV

Hi,

Are there any examples of using average current mode control (ACMC) for buck regulators? Can the C2000 achieve a ACMC digital control loop with just receiving voltage divider feedback from the output voltage and inductor current feedback from a current sense amplifier?

Has anyone ever achieved this? I cant seem to find anything on this.

  • 0
    TI__Expert 4195 points

    Hello Mike

    Please check the reference design pmp23338. This is totem pole PFC (AC/DC converter) based on average current mode control. In this design, we have outer voltage loop plus inner current loop control.

    Thanks

    Amir

  • 0 in reply to Amir Hussain
    TI__Mastermind 18531 points

    Hi Mike,

    I have a version of our TIDM-DC-DC-BUCK reference design example which leverages closed-loop ACMC. Please let me know if you are interested. This is a software implementation for evaluation purposes only so does not come with any accompanying documentation (though code is commented appropriately)

    Regards,

    Peter

  • 0 in reply to Peter Luong1
    Intellectual 300 points

    Hi Peter,

    Yes that would be very helpful! Thank you so much!

    Do you also by any chance have examples for phase shifted (phase modulation) control like for Phase-Shifted Full-Bridge or a Dual Active Bridge converter.

  • 0 in reply to Mike Allette
    TI__Mastermind 18531 points

    Hi Mike,

    This zip contains the CCS project to demonstrate ACMC on the TIDM-DC-DC-BUCK project interfacing on the BOOSTXL-BUCKCONV hardware with F28004x LaunchPad. This has been fully tested on hardware but compensators are generic and not tuned. From my testing, this works as expected

    buck_F28004x_ACMC.zip

    ACMC is implemented on top of the closed-loop VMC build (build 2).

    Project can switch between closed-loop VMC and closed-loop ACMC by changing the #define ACMC in the buck_user_settings.h file. Setting to 1 will be ACMC and setting it to 0 will be VMC.

    Also, I have created a different debug environment so you can execute this script to see the desired ACMC variables used in the code. Refer to the lab2_acmc.js file

    Regards,

    Peter